Mec uses a single stage press for bushing sizes. With it the bar is under the powder bottle while you're crimping, depriming, and priming which allows the bushing to fill more than a progressive press where the bar is only momentarily under the powder bottle. You need to go up one bushing size if useing a progressive press. That's why, as Mark said, weigh all you loads. I use a digital scale [ about $35 ] and an adjustable bar [ about $35 ] . No more bushing and you can really dial in a load. Because humidity can change powder readings, I usually weigh once and let it go at that. Right now for clays I'm shooting a 24gm load [ 361grs or between 3/4 and 7/8 oz ]. Cheap on the wallet, easy on the arm, and breaks clays out to 50 yds. Paul
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